31045230213 has 4 divisors (see below), whose sum is σ = 41393640288. Its totient is φ = 20696820140.

The previous prime is 31045230109. The next prime is 31045230247. The reversal of 31045230213 is 31203254013.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 31045230213 - 2²⁵ = 31011675781 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31045230613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5174205033 + ... + 5174205038.

It is an arithmetic number, because the mean of its divisors is an integer number (10348410072).

Almost surely, 2^31045230213 is an apocalyptic number.

It is an amenable number.

31045230213 is a deficient number, since it is larger than the sum of its proper divisors (10348410075).

31045230213 is a wasteful number, since it uses less digits than its factorization.

31045230213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10348410074.

The product of its (nonzero) digits is 2160, while the sum is 24.

Adding to 31045230213 its reverse (31203254013), we get a palindrome (62248484226).

The spelling of 31045230213 in words is "thirty-one billion, forty-five million, two hundred thirty thousand, two hundred thirteen".